<!DOCTYPE html>
<html>
<head>
    <title>Skia WebTry</title>
    <meta charset='utf-8' />
    <style type="text/css" media="screen">
        textarea {
            margin-left: 0;
            border: solid 1px #ccc;
            color: green;
        }
        pre, code {
            padding: 0;
            color: green;
        }
    </style>
</head>
<body>
  <pre><code>#include "SkCanvas.h"
#include "SkGraphics.h"
#include "SkImageEncoder.h"
#include "SkImageInfo.h"
#include "SkForceLinking.h"

int main() {
  SkForceLinking(false);
  SkGraphics::Init();

  SkImageInfo info = SkImageInfo::MakeN32(300, 300, kPremul_SkAlphaType);
  SkBitmap bitmap;
  bitmap.setConfig(info);
  bitmap.allocPixels();
  SkCanvas c(bitmap);
  c.drawColor(SK_ColorWHITE);

  <textarea name='code' id='code' rows='20' cols='80'>SkPaint p;
p.setColor(SK_ColorRED);
p.setAntiAlias(true);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(10);

c.drawLine(20, 20, 100, 100, p);
</textarea>

  if (!SkImageEncoder::EncodeFile("foo.png", bitmap, SkImageEncoder::kPNG_Type, 100)) {
    printf("Failed to encode\n");
  }
}
</code></pre>

  <p>Image appears here:</p>
  <img id='img' src=''/>

  <pre><code id='output'></code></pre>

  <input type='button' value='Run' id='run'>
  <script type='text/javascript' charset='utf-8'>
      var run = document.getElementById('run');
      var code = document.getElementById('code');
      var output = document.getElementById('output');
      var img = document.getElementById('img');

      function codeComplete(e) {
        // The response is JSON of the form:
        // {
        //   "message": "you had an error...",
        //   "img": "<base64 encoded image but only on success>"
        // }
        //
        // The img is optional and only appears if there is a valid
        // image to display.
        console.log(e.target.response);
        body = JSON.parse(e.target.response);
        output.innerText = body.message;
        if (body.hasOwnProperty('img')) {
            img.src = 'data:image/png;base64,' + body.img;
        } else {
            img.src = '';
        }
      }

      function codeError(e) {
        alert('Something bad happened: ' + e);
      }

      run.addEventListener('click', onSubmitCode);
      function onSubmitCode() {
          var req = new XMLHttpRequest();
          req.addEventListener('load', codeComplete);
          req.addEventListener('error', codeError);
          req.overrideMimeType('application/json');
          req.open('POST', '.', true);
          req.send(code.value + '\r\nEOF\r\n');
      }
  </script>
</body>
</html>
